XMLHttpRequest Security errors

Hey /prog/, not a regular but I thought I'd try you guys - I'm running into problems when I try to load cross-board content using xmlhttprequest. Apparently it only works in the same domain, so I get security errors when a link pointing to img wants to load content from dat (the cross-board links send you to a redirecting page which does this). Any ideas on how to work through this? I'm running the code through the Greasemonkey Firefox extension. Thanks!

You faggots. This shit was already solved ages ago. What you need is a public+private key system, using a smart card, were the private key never leaves the card.

Anything else are band aids. HTTPS is fucking useless in the real world, who sniffs networks for real? Maybe in public places (<0.1% of total users), but at home 99.9999% of information thefts are a result of the machine being compromised. Good luck with that!